package com.example.xuyuli.filter;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;


public class LoginFilter implements Filter {
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest httpRequest = (HttpServletRequest)servletRequest;
        HttpServletResponse httpServletResponse = (HttpServletResponse)servletResponse;
        HttpSession session = httpRequest.getSession(false);
        if (session.getAttribute("name")==null){
            httpServletResponse.sendRedirect("Login.jsp");

        }
        else {
            filterChain.doFilter(servletRequest,servletResponse);

        }

    }
}
